STRING RECURSION

I tried solving a problem from gfg.
question : https://practice.geeksforgeeks.org/problems/total-decoding-messages/0/

And this is my code for it… I dont understand why does it give segmentation fault, Pease help.

https://practice.geeksforgeeks.org/problems/total-decoding-messages/0/

@shahpankti931 refer this

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